/Engine/Source/Editor/Persona/Public/IPersonaPreviewScene.h
Set the preview animation blueprint and an optional overlay (for sub-layers)
void SetPreviewAnimationBlueprint ( [UAnimBlueprint](API\Runtime\Engine\Animation\UAnimBlueprint) * InAnimBlueprint, [UAnimBlueprint](API\Runtime\Engine\Animation\UAnimBlueprint) * InOverlayOrSubAnimBlueprint )